alleryUsing the digit-sum rule, which number has 3 as an exact divisor?
A263
B265
C262
D261
Answer & Solution
Correct answer: D. 261
1. 261 = 3 × 87.
2. The digits 2 + 6 + 1 = 9 are a multiple of 3.
3. The others leave remainders.
_Source: Wikipedia, Divisor (CC BY-SA 4.0, rev 1379861144), divisor_
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